中線蝶閥
密封材料為橡膠、聚四氟乙烯等。由于結構獨特的限制，不適用耐高溫、高壓及耐腐蝕、抗磨損等工況。
The sealing materials are rubber, polytetrafluoroethylene, etc. Due to unique structural limitations, it is not suitable for working conditions such as high temperature and high pressure resistance, corrosion resistance, and wear resistance.
